bollaert



Dec. 22, 1931, BQLLAERT' 1,837,522

PUNCHING MACHINE Filed April 1'7, 1929 3 Sheets-Sheet 1 Fig.5 a: fig. 2

IN VEN TOR.

A TTORNEY Dec.-22, 1931. M. F. BOLLAERT PUNCHING MACHIN'E Filed April 17, 1929 3 Sheets-Sheet 2 By 777%. M

A TTORNEY Dec. 22, 1931. M. F. BOLLAERT 1,337,522

PUNCHING MACHINE Filed April 17, 1929 3 Sheets-Sheet 3 INVENTOR.

miww

, ATTORNEY Patented Dec. 22, 1931 UNITED STATES PATENT O ICE MEDARD I IBOLLAERT, OF OAKLAND, CALIFORNIA;

. liunonrno MACHINE,

Application filed April 17,

The invention relates to a punching ma-I rial at points thereof appreciably spaced from the sheet edges.

Another object of the invention is to provide in a machine of the class described and i 1 having a plurality of movable tools for selective use, an improved means for securing the tools not in use in an lnoperativevposition; said means permitting a particularly" ready replacement of a tool when and as required. Y

A further object of-the invention is to provide a machine of the class described'in which the movable tools are held against rotation at all times. I

Still another object of the invention is to provide a particularly simple, positive, and rel-easable'means for securing a holder in position to operatively'dispose a selected tool. 7

0 An added objectof the invention is to p vide in the machine a shear having a'straight cutting edge for forming slits in sheet mate rial.

provide a particularly effective punch for use in the machine. p

The invention possesses other objects and features of advantage, some of which, with the foregoing, will be set forth in the following description of a preferred form of the invention which is illustrated in the accompanying drawings, in which,

Figure 1 is a side elevation of a machine embodying the invention, the sheetperforating elements thereof being all inoperatively' disposed. V

Figure 2 is a fragmentary vertical'section through the machine, a punch member at said ing stroke thereof.

. means therefor.

section being disposed at the end of a work:

1929. serial No. 355,928.

Figurev 3 is a perspective view .of a spring detent member of the structure. l Flgure 211s a front elevation of the'jm'achine, a portion of a tool actuating devicef a thereof being disclosed in section.

Figure 5 is a plan view taken generally at" the broken line 55' in Figure 1. Figure 6 is an enlarged fragmentary View takenat theline 6-6 in Figure 5',parts of the showing being broken away to show the construction thereat. i

Figure 7 is an enlarged fragmentary sec- 7 tion taken at 77 in Figure 5.

Figure 8 is a fragmentary section on the i line 88 in Figure i V v 1 Figure 9 is a section of a punch of the de-; vice taken at the line 9-9 in Figure 8. By reference to the drawings, the elements oft-hepresentinvention are seen tobe incorpo I rated in the structure of a punching machine having a one-piece U-shaped'frame 12 carrying within it a one-piece U-shaped holder 13 which in turn supports a plurality of punches 14 and their dies 15. The punches are arranged tobe actuated selectively by means of a mandrel 16 mounted for reciprocation in the frame 12, said holder being movable'in'th'e frame for-disposing a selected punch for operation by the'mandrel 16. The frame structure is seen to be of T section, withthe stem" of the T provided by a web portion'17defining the plane of the frame and'giving a required amount of rigidity theretoin'said A still further ob ect of the invention 1s to plane whereby a forcing apartofthe legs'of the frame is resisted. One leg 18 of the frame is provided along itsouter edg'e'fwith feet 19 to provide a base for the frame, 1 7

while the otherleg 21 of the frame carries the aforesaid mandrel 16 and an operating As particularly disclosed,l though not necessarily so, the machine is dis posed with the frame legs horizontal wh'ereby the plane of the frame is vertical. The plane of the holder 13 is also-vertical and said holder is mounted for rotation mounting the holder in the frame, the bolt 22 extendingdownwardly through the lower about a fixed axis with respect to the frame 12. Pivot bolts 22 and 23 are utilized for leg 24 of the holder and vbeing threadedly" engaged in thelower frame leg 18 while the bolt 23 extends through the upperholder leg 25 and is threadedly engaged in the upper frame'leg 21; accordingly, the pivotal axis 5 of the holder is in the plane of the frame and is vertical. The pivot bolts 22 and 23, it is noted,'engage the respective legs at in te'rmediate points thereof, which points, 1-n the case of the holder, are seento be substantially at the middles of its legs. Inthi's manner, the space defined between the holder legs is seen to be entirely unobstructed even though the pivotal axis of the holderpasses inafter described. The member 26 is. also --vertically slotted from th'e outer face thereoftoprovidea guideway for a vertically reciprocable shearing blade 31, said bladeprovidinga cutting edge which is obliqueto the horizontal. The punches 14 and bla de the pivotal axis of the holder, the utility-of 4.0wsaid notches-being hereinafter set'forth. It is particularlynoted that the heads 32 are aligned. in an are having its axis of curva ture coincident with the pivotal axis of the holderiwhereby the various heads: move in a. 4 com-mon path-:when the holder is displaced.

Therdies; are mounted on the member 27; opposite thepunches 29, said dies being; secured-in place by means of theirthreaded, or other, engagement in 'openings35 extendg ;:ing;verticallythrough themember, the struc tureand relations being particularly shown in Figures'2 and 8 of the drawings. The dies 15"are, of course, cooperative with'thev V opposed punchesforperforating a plate dis- 5v pcsed between the-members 26 and27 there-. at; A shear blade 36 is also mounted onthe member 27 for cooperation with-the. blade 31. Preferably, andas particularly shown in Fig. ures 5,-6v and 7, the blade 36 is carried by. and betweencooperating. screws 37 threadedly engaging the member .27 whereby to. effect the adjustment of its shearing edge with. respect.-

to the working edge ofthe-blade 31.

V A vertical-bore40 is providedthrough the V fieiferward. end 4150f the. upper frame; leg- 21,

31 are seen to be provided atthe top thereof with like cylindrical; heads 32, each. of. said heads.being providedwith a lateral-seg mental notch--33 at the side thereof toward and the tool operating mandrel 16 is reciprocably fitted therein, said end 41 thus constituting a mandrel head. Preferably, and as shown, the axis of the bore 40 intersects the line of movement of the tool heads The lower end of the mandrel 16 is arranged to overlie a head 32 and is provided with a dependingl slraped extension, having a forwardly directed portion 43 thereof disposable in a tool head notch 33 whereby the tool engageda thereby. may.be--reciprocated with the mandrel.

Themandrel is arranged to be reciprocated throughgbut a relatively short distance, preferably bya mean's'having a high mechanical. advantage. As particularly disclosed,

lever meanssare provided for actuatingtheu mandrel and are mounted'in the headklll' Pivot shafts extend laterally oppositely. from the head .41 andhavejournaHed thereon the extremitiesofthe legs-45 of afforked lever 46, said leverlegs spanning thehead, The

innersides: of the lever legs .45: areprovided with eccentrics 1 7- and links are provided; hav ng bores at, one .endafor receivingsaid:

eccentrics.. Theother link ends areconnected' by a rock' shaft which extends through and is journ-alled in the upperend of the mandrel 16, it being noted that 'the arrange; 1

menteof arts issuch that when the lever 46 is exten ingupwardly andrearwardly, as is shown in Figure .1, the mandrel is in its. nor-, mally ra1sed'pos1t1on,"wh1le aforward' swing,

ing of the lever depresses the mandrel, as is shown in Figure 2.

v Normally,- allv the tools are disposed in in- V operat vely' raised positions with their head notches-33 coplanar, and under these conditlons the notch engagingmandrel extension 13 is.-.arranged.;to lie injthe plane of the notches. In; this .mannemthe holder 13 may, be swung to dispose and engage; a: selected tool' beneath .the mandrelfor reciprocatinj therewith. Since the tools not engaged by. the mandrel are tobe.inoperatively disposed,

and yetmust 1 be depressible when engaged I by; the mandrel, a track-bliis provided for.

engaging the head notches 33'of said tools to hold; themin the: afores aid planar relation.

As particularlyshown in Figures 1 and5, the

track 51 comprises an arcuate plate mounted ona-nd-beneaththe upper frame; leg 21 and having its outer-edge simultaneously engageable 1n the-:vari'ous tool head notchessaid plate edge being cutaway *however beneath the mandrel to permitrthe'mandrelextension 43 to replace the plate ed'gefthereat; In'this,-

manner, a continuous supporting track and guidewayisprovided forthetoolheads as the holder isvariably adjusted. The track .51'is seen to be secured to the upper frame leg: 21

by means, of. screws 52, ands-the extremities thereof." are carried by brackets v.53 Imounted; 011;?311-(1 extending, transversely; from: the said:

frame 3 leg.

It will now be noted'tha t thearc of the track 51 is substantially one hundred eighty 7 remaining tools engage the track; The track 51 is preferably no longer than necessary, whereby a swinging of the holder 13 to dispose allthe tools to the same side of the mandrel will release the tools from the track; in this manner any tool may be removed by swingingthe holder to disengage it from the track. Since a-tool releasing positioning of the holder will not ordinarily be desired, displaceable stops 54- are preferably provided at the ends of the track 51; as particularly shown'in Figures land 5 the stops 54 comprise turn buttons loosely pivoted at the ends of "the brackets 53 to gravitationally maintain their operative disposition at the track end, said stops being engageable by the tool heads at the ends of the line thereof.

Informing the various members now described, a certain amount of clearance ispro vided between the opposed faces of the extremities of the upper frame and holder legs 21 and 25 respectively, part of said clearance being taken up by the track 51. The opposed faces of the lower frame and holder legs 18 and 24 respectively are finished plane and are arranged to lightly and slidably engage, whereby, when the machine is used, said lower frame leg may serve as a supporting anvil for the die carrying member of the holder. Since the withdrawal of a punch from a perforation of a plate will tend to lift the holder thereat, means are preferably'provided in the aforesaid clearance space above the holder for preventing an appreciable upward displacement, or springing, of the holder, and as shown, such means comprises the mounting of aplate 55 on and beneath the track 51, said plate providing-a lower bearing face for engaging the opposed upper face of the holder portion 26 if such displacement occurs, the normal clearance of the plate and portion being very slight. Since the frame and holder members are cast and their dimensions may vary slightly, the plate 55 is mounted on sleeves 56 threadedly engaging the track for adjustment therein and issecured to the sleeves by means of screws 57 eXtendinga-X- ially through the sleeves. In this manner, a minimum of machining is required in fitting the parts of the machine together. This featureis particularly brought out in Figures 2 and 6. To permit the escapeof punched out portions of the sheet to be perforated,

the lower leg of the frame is obliquely cut away at the forward side thereof and in the line of the mandrel 42 to'providea chute58 for the'gravity escape ofsaid sheet portions from below the dies.

Means are provided for retaining a selected tool in engagementwith the tool operating mandrel 42, and as particularly shown, said 7 means comprlses a leaf-spring member 61 5 mounted on the mandrel carrying headf ll" at the forward face thereof. A lower and free end of portion 62 of the spring 61' is turned inwardly to lie in'the path'of move mentof the tool heads 32 and is'notched'atf its extremity to engage-a tool head at opi posite sides thereof wherebyfthehead and its holder are held against displacement in the path of adjustment thereof; The spring portion 62' is arranged to resiliently and slidably engagea tool head, and the head may readilybe released by manually pulling the spring end forwardly to disengage 'it.'

The present device, it is noted, is par-- ticularlydesigned' for perforating relatively large sheets without requiring a machine of undue size, such being accomplished by leav-" ing the clear interior space in thepivotal llneof the holder. Since the tools arefoper' ated at afixed point of the machine, stop means are provided for a-dj-ustably limiting the insertion of a sheet within the holder] space. As showngrods' 6.3 are mountedat opposite sides of the lower frame'leg 18t0 extend therea-long, and perforated stop arms 64 are slidably mounted on the rods 63, said arms being disposable to intersect the plane of the holder space. Set screws 65 are'pro-'- vided in the arms 64 for fixing them in set 5 position.

Certain of the punches, andparticularly the larger ones, are provided with leading I points 66 rather than having all'parts of the cutting edge in a common plane as is usual. For forming the cutting edges 67 of these punches. to provide the points-66,]a tool blankis first spherically'cuppedat its leading end and then cylindr'ically cupped across said end with theaxis of the cylinder of cupping perpendicular to the punch axis; 1

the spherical cupping may, on occasion, be

omitted. A punch thus made is seento pro vide for a sawing, or slicing, cut of the ma terial thereat rather than astraight shear,

whereby the application of the c'utting'force; applied through the mandrel is more eflec- The punch structure is particularly disclosed in Figures 8 and 91 Generally, and

tive.

particularly with'such a punchas that now described, rotation of the punch while cuttingis not desired, and such is seen to be pre'vented by reason of the provision of segmental, rather than annular, tool head notches 33 for receiving the mandrel ex ten sion 43. The track 51 is seen to similarly engage the tools not in use, so that saidtools are held for proper engagement with the mandrel when the holder 13 is moved to dispose themthereat. r

With respect to the cooperative shearing blades 31 and 36, it is noted by referenceto 1 Figures 6 and 7 that the movable'blade 31 isp'rovided with a cutting edge/71 which isoblique-tothecutting edge'of the lower blade-whereby sl-its'of varying lengths may a be-madie: in; sheet material. Obviously a) number offl'said slits-may be" combined with each-other oran opening differently formed,

to. provide. a...-pe;rforation of some special shape. having; one or more straight sides. The provisionof ai shear means as part of the: present machine, is therefore seen to be at-highlyuseful, I

The operation-andapplication of themachinenow described is deemed to be amply covered in the foregoing description. It

is particularly I noted that, for the iwork'to i She donethereby, the presentmachine. is particularly compact, involves a minimum of with the-device which I now consider tobe. the? best embodiment thereof, I desire to have itunderstood that the device. shown 1s mere- Qly illustrative, and that suchchanges may be made, When desired,.as fall Within the scope of the appended claims.

Having thus described my '1nvent1on, I claim as new andv desire to secure by Letters Patent of'the- United States; the following 1. Ina machine of the class described, a

frame,- acne-piece. tool holder pivotally mounted in said frame and arranged for oscillation about a fixed axis, a set of arcuatelyaligned-movable tools carried by said tool holder,'a'setof fixed dies mounted on said holder to -cooperate with said tools, the 'arc'oftheline ofs'a-id tools being coaxialwith saidaxi-s, and said. holder being formed-to i -fireceive therein andbetween the sets .of tools and dies a sheet of material tobe operated on by aselected-tool ata specified point thereof,

the. axis. of-saidtool-holder being so positioned that the distance between said point: iilioflthe sheet andthe nearestedge of the sheet may exceed the radius of said arc.

2. In. at machine of the class described, .a

frame,- a-.tool-holder' pivotally mounted in said frame and arranged for a ho-rizontalos- .5?cillati'on about afixed axis, a plurality of radially positioned'headed tools carried-by said toolholderand a plurality ofcooperating dies-mountedftherein to receive the .tools,

I said tools and dies defining arcuatetlines QMcoaxia-l: with-saidaxls, each of sald tools having a notch formed in one side of the head thereof,a-rec1procable mandrel mountedvon-said frame and providing means nor,

mally disposed to engage sai'd notch in the fiii'head of a selected one ofsaid tools'for' reciprocation therewith, and ,altrack member en gaging the notchesin the heads of the remainingtools for holding, them in inoperative position with respect to their dies, said member' lying entirely, at the radially inward. side 3.1na machineof the class described, a framegza tool holder pi-votally mounted in.

said frame'and arranged for a horizontal os-' 'cillation about a; fixed axis, av plurality of radially positioned-headed too-lscarried by. said tool holder and ya plurality of cooper? I atingdies mounted therein toreceive the tools, said tools and dies defining arcuate! lines coaxial with: said axis, a reciprocable mandrel mounted on said frame and ;providing means normally} disposed to receive the. headof a' selected one of said tools-for re' ciprocation therewith, and track segments fixedly mountedonsaid frame and. normally engaging the heads of tools. not engaged by V i i the mandrel tohold them againstflrotation andin' inoperative position with respect to their dies, saidsegments-extendingv only-rap.

diallyinwardly of said tools andsaid. holder being arranged to be swung to' release the.

tool heads from the tracksegments to per m'itthe dismountin gof the tools from the,

holder. 3 e I 4.111 a machine of. theclassdescribed, a frame, a tool'holder pivotally mounted in said frame and arranged for a horizontal -oscillation about a'fixed axis,-. aplurality of radially positioned headed tools carried by said tool holder and-a plurality 'of cooperating dies mounted'therein'to receive the tools, said tools and dies defining arcuate lines coaxial'withsaid axis,-a reciprocable mandrel mounted on said frame'and providing means normally disposed to receive the head i of a selected one ofsaid tools fonreciprocation therewith, track segments-fixedly-mount'- ed on said frame and normally engagingthe heads 'of;tools not engagedby the mandrel to hold the said tools againstrotation and.

in inoperative position withrespect to their' dies; and displaceab'le stop means on said trackmembersnormally operative against/ said tool holder to prevent the disposal thereofto release the tool headstherefrom.

5'. In a device of the classdescribed a rig-id support, a. 'toolholder movable" there-.

in, a plurality of differing punches carried by" said tool holder, a'mandrel. mounted in. said'support andhaving means forengag ing said tools. individually, means for posi- .tioningra-selected said punch-in axialralignment with said 'mandrel, and a notched spring me'ans ;mounted* on said support and releasably engaging the said selected; punch. for releasably locking the tool holder against-j movement when: the: said selected tool; hasv been positioned. r I 6. In a device of the class described',a' rigid support, a tool holder. movable there in, a plurality of differing punches carried by said tool holder, a mandrel mounted in said support and having means for engaging said tools individually, means for positioning a selected said punch in axial alignment with said mandrel, and spring means fixedly mounted on said support and engaging a tool for releasably locking the tool holder against movement when the said selected tool has been positioned.

7. In a punch of the class described, a U- shaped frame having a leg serving as a base, and a U-shaped tool holder of integral construction disposed between the legs of said frame and pivoted thereto for'rotation about an axis intersecting the legs of I said frame and holder at intermediate points thereof, the space between the holder. legs being unobstructed.

8. In a device of the character described, 7

a frame, a substantially U-shaped tool holder, a tool carried by the holder, a die member carried by the holder, means on the frame for causing cooperative movement between said tool and die member, and a pivotal support disposed between the connected and open ends of said U-shaped tool holder, whereby the tool and die may be swung into alignment with said means on the frame.

9. In a device of the character described, a frame having a pair of spaced arms, a tool holder having a pair of spaced arms, tools carried by one arm of the holder, cooperating dies carried by the other arm of the holder, and axially aligned pivotal connections between the arms of the frame and the arms of the tool holder at points intermediate the ends of the arms of the tool holder.

ture.

" MEDARD F. BOLLAERT.

In testimony whereof, I aflix my signa 

